Difference between revisions of "CNC Router"

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{{Project|Creator=Nykodemus
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|Status=<onlyinclude> Your Status </onlyinclude>                                <!--LEAVE ONLYINCLUDES FOR STATUS HACK-->
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|Born On=00:34, 24 June 2010 (CDT)                                                                  <!--DO NOT EDIT -->
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==Overview==
 
Ye Olde Shoppe NEEDS a CNC router.
 
Ye Olde Shoppe NEEDS a CNC router.
  
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[http://fab.cba.mit.edu/classes/MIT/863.09/people/dcarr/final/final.html MIT student's 3-axis CNC milling machine that costs less than $100]
 
[http://fab.cba.mit.edu/classes/MIT/863.09/people/dcarr/final/final.html MIT student's 3-axis CNC milling machine that costs less than $100]
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[[Category:Open manufacturing]]                                                  <!--MAKE AS MANY CATEGORIES AS YOU NEED-->

Revision as of 23:34, 23 June 2010

Creator:
Nykodemus
Status:
Your Status
Born On:
00:34, 24 June 2010 (CDT)
Last Updated:
23:34, 23 June 2010 (CDT)

Overview

Ye Olde Shoppe NEEDS a CNC router.

I have only just begun this project, and I could certainly use help.

We already have two decent-sized steppers rated at 1.8deg per step (both unipolar). The z-axis doesn't need to be so beefy or precise, I think, but if you happen to come across a nice 1.8deg/step unipolar (5 or 6-wire) stepper, by all means commandeer it!

Instructables has a simple circuit for the controllers here I think we have the zener diodes and mosfets required for this circuit.

This guy here is just using a single uln2003 chip to drive each motor. I don't know how good that is for the motor or for the chip, but it seems to work. Also, there is no isolation.

TODO:

  • build the driver circuit
    • buy either uln2003 chips or cd4516 and cd4028 chips
    • buy some opto-isolators? (optional?)
  • build the housing (I like the idea of moving the piece on one axis, and the router on the other axis ala the MIT design below) (MDF? Acrylic?)
    • buy some precision threaded rods


Some example CNC machines on the cheap:

Instructables: Easy-to-Build-Desk-Top-3-Axis-CNC-Milling-Machine

MIT student's 3-axis CNC milling machine that costs less than $100